Django models 我需要显示与同一型号有多对多关系的相关文件。Django休息架

我正在尝试创建一个相关的产品字段，我在模型中添加了多对多关系字段，并将其设置为self，因为我将手动选择相关的产品

class ProductsSerializer(serializers.ModelSerializer):

    images = ImagesSerializer(many=True)
    color = ColorSerializer(many=False)

    class Meta:
        fields = (
            'url',
            'id',
            "code",
            "sku",
            "title",
            "slug",
            "state",
            "old_price",
            "price",
            "valid",
            "in_stock",
            "category",
            "related_products",
            "color",
            "images",
            "video",
            "description",
            "fabric",
            "model_size_info",
        )
        model = Products

我不能引用api json中获取产品详细信息所需的相同序列化程序。我找不到办法

---

提前感谢大家的帮助。

方法-1:覆盖

\uuu init\uuuu（）

方法

class ProductsSerializer_Temp(serializers.ModelSerializer):
    images = ImagesSerializer(many=True)

    class Meta:
        fields = (
            'url',
            'id',
            "title",
            "images",
        )
        model = Products


class ProductsSerializer(ProductsSerializer_Temp):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields.update(
            {"related_products": ProductsSerializer_Temp()}
        )

---

首先，我认为应该使用类似的方法来防止递归

class DynamicFieldsModelSerializer(serializers.ModelSerializer):
    """
    A ModelSerializer that takes an additional `fields` argument that
    controls which fields should be displayed.
    """

    def __init__(self, *args, **kwargs):
        # Don't pass the 'fields' arg up to the superclass
        fields = kwargs.pop('fields', None)

        # Instantiate the superclass normally
        super(DynamicFieldsModelSerializer, self).__init__(*args, **kwargs)

        if fields is not None:
            # Drop any fields that are not specified in the `fields` argument.
            allowed = set(fields)
            existing = set(self.fields)
            for field_name in existing - allowed:
                self.fields.pop(field_name)

然后，您可以使用

SerializerMethodField

，还可以在相关产品中指定所需的字段（“不要传递

相关产品以防止递归”）：

这是我遇到的解决办法。
我创建了另一个序列化程序

class ProductsSerializerTemp(serializers.ModelSerializer):
    color = ColorSerializer(many=False)

    class Meta:
        fields = (
            "color",
            "url"
        )
        model = Products

然后我把它交给了我原来的序列化程序

class ProductsSerializer(serializers.ModelSerializer):

    images = ImagesSerializer(many=True)
    color = ColorSerializer(many=False)
    related_products = ProductsSerializerTemp(many=True)


    class Meta:
        fields = (
            'url',
            'id',
            "code",
            "sku",
            "title",
            "slug",
            "state",
            "old_price",
            "price",
            "valid",
            "in_stock",
            "category",
            "related_products",
            "color",
            "images",
            "video",
            "description",
            "fabric",
            "model_size_info",
        )
        model = Products

我几乎完成了这项工作，我不确定这是否是最好的解决方案，但效果很好。
我尝试过，但这是递归。我想我忘了提到相关的产品也会有相关的产品在里面，所以我需要在这一节中小心。我也可以使用深度属性，但我需要这些产品的颜色，我已经在当前代码中得到了，所以深度需要为2，这是相当少的使用，将需要更长的时间来响应，希望保持最小并且有效。“\uuu init_uuuuuuuuo（）得到了一个意外的关键字参数“fields”它不可用请注意
类产品序列化程序（DynamicFieldsModelSerializer）：
您的序列化程序应该继承自
DynamicFieldsModelSerializer
我找到了解决方案。我创建了另一个序列化程序，并将其设置为检索信息，让我将其作为答案。
class ProductsSerializer(serializers.ModelSerializer):

    images = ImagesSerializer(many=True)
    color = ColorSerializer(many=False)
    related_products = ProductsSerializerTemp(many=True)


    class Meta:
        fields = (
            'url',
            'id',
            "code",
            "sku",
            "title",
            "slug",
            "state",
            "old_price",
            "price",
            "valid",
            "in_stock",
            "category",
            "related_products",
            "color",
            "images",
            "video",
            "description",
            "fabric",
            "model_size_info",
        )
        model = Products